Chi-Ying Diana Sage, ARNP
Family Nurse Practitioner · Waterloo, IA
Chi-Ying Diana Sage, ARNP is a family nurse practitioner with a practice address in Waterloo, Iowa, and NPI 1831722370, issued on Feb 12, 2020. Check the license (Iowa A157738, as entered in NPPES) with the Iowa board that licenses this profession; the Medicare figures below come from public CMS files.
- Name
- Chi-Ying Diana Sage
- Credential
- ARNP
- Primary taxonomy
- Family Nurse Practitioner 363LF0000X
- License number
- A157738 IA
Self-reported in NPPES; status is on the state search - Practice location
- 1753 W Ridgeway Ave Ste 103A, Waterloo, IA 50701
- Phone
- (319) 235-3568
- Enumerated
- Feb 12, 2020
- Record last updated
- May 14, 2020 (not updated in 6 years: call before relying on the address or phone)
- Fax
- (319) 235-5013
- Medicare enrollment
- Enrolled (PECOS I20200416002626); accepts Medicare assignment
- Entity
- Type 1 · individual
8 nearest family nurse practitioner records → All 1,971 in Iowa → Look up another NPI →
Also registered at 1753 W Ridgeway Ave Ste 103A
A shared address usually means a shared clinic or building; it does not show who employs whom.
- Matthew Smith, MDFamily Medicine Physician1609876507
Verify Chi-Ying Diana Sage in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersWhich Iowa board licenses this profession
Search for license A157738Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
68% more Medicare Part D claims than the average family nurse practitioner in 2024
2,197 Medicare Part D claims for 410 beneficiaries, against an average of 1,305 among the 140,557 providers of this specialty who prescribed in Part D. Brand-name drugs were 6% of claims. 36 claims were for opioids.
Most prescribed
- Atorvastatin Calcium149 claims
- Pantoprazole Sodium87 claims
- Levothyroxine Sodium86 claims
- Simvastatin72 claims
- Meloxicam64 claims
- Lisinopril-Hydrochlorothiazide57 claims
Source: CMS Medicare Part D Prescribers by Provider and Drug, 2024 (data.cms.gov). Part D covers prescriptions for Medicare patients only; drugs with fewer than 11 claims are not published.
Industry payments in 2024: $2,746.28
143 payments; by number, the most common kind was food and beverage; the largest payer was Pfizer Inc. The 99,489 providers of this specialty with any payment received $650.95 on average. Payments are reported by manufacturers, not by the provider, and are not a sign of wrongdoing.
Source: CMS Open Payments, program year 2024 (openpaymentsdata.cms.gov); average among providers of this specialty with at least one payment.
Bills Medicare through one group practice
- Matthew Smith MD PCWaterloo, IA
Source: CMS Doctors and Clinicians National Downloadable File (the group practices a clinician bills Medicare through) (data.cms.gov).
Chi-Ying Diana Sage among 1,971 family nurse practitioner records in Iowa
Chi-Ying Diana Sage, ARNP is one of 1,971 family nurse practitioner records with a practice address in Iowa. 84% of them appear in a Medicare file (Part D prescribing, MIPS, Open Payments or Medicare group billing); this one does. Its NPI, issued in 2020, is newer than 60% of them.
- NPI issued2020 · 60% of these records are older, 33% newer
- In a Medicare fileYes · 84% of these records are
- In the CMS Doctors and Clinicians fileYes · 71% of these records are
- Graduated2019 · median 2018 among the 1,398 with a school on file
- Record last updated2020 · 43% of these records were not updated in five years or more
Source: CMS NPPES, file of Aug 9, 2026, every record with primary taxonomy 363LF0000X and a Iowa practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).
66 family nurse practitioner records list a practice address in Waterloo
They are 66 of the 1,512 NPPES records with a practice address in Waterloo, and 1,971 family nurse practitioner records in Iowa.
All 1,971 in Iowa → Every provider in Waterloo → Family Nurse Practitioner nationwide →
The 8 family nurse practitioner records with the nearest ZIP codes
- Katie Bries, ARNPWaterloo, IA 507011427490226
- Wendy Chapin, ARNPWaterloo, IA 507011740616739
- Maryjane Cose, ARNPWaterloo, IA 507011235677691
- Alena Ellerbroek, MSN,FNPWaterloo, IA 507011376858654
- Rhian Gronewold, ARNP-BCWaterloo, IA 507011912374141
- Jeffrey GuseWaterloo, IA 507011063827798
- Michaela Johnson, ARNPWaterloo, IA 507011407312549
- Kayley Lawrence, ARNPWaterloo, IA 507011154911865
Common questions
What is Chi-Ying Diana Sage, ARNP's NPI number?
Chi-Ying Diana Sage, ARNP's National Provider Identifier (NPI) is 1831722370, issued on Feb 12, 2020. An NPI identifies a provider in billing; it is not a license.
Where is Chi-Ying Diana Sage, ARNP located?
The NPPES record lists a practice address at 1753 W Ridgeway Ave Ste 103A, Waterloo, IA, 50701. Phone: (319) 235-3568. Providers update this record themselves, so call before visiting.
How can I verify Chi-Ying Diana Sage, ARNP's license?
NPPES lists Iowa license number A157738, as entered by the provider. Search the Iowa board that licenses this profession; the NPPES record confirms identity only.
How much does Chi-Ying Diana Sage, ARNP prescribe under Medicare Part D?
In 2024, Chi-Ying Diana Sage, ARNP had 2,197 Medicare Part D claims for 410 beneficiaries; the average among family nurse practitioner prescribers was 1,305. Part D covers Medicare prescriptions only.
Source: CMS National Plan and Provider Enumeration System (NPPES), file of Aug 9, 2026 (NPPES files on CMS.gov); NUCC Health Care Provider Taxonomy. Medicare files from data.cms.gov. An NPI identifies who bills; it is not a license.
Figures on PlainDoctor are read from the federal files each page names (CMS NPPES, Medicare Part D, MIPS, Open Payments; the HHS-OIG exclusion list only as counts) and from Census population estimates, with the file date shown beside them. See our editorial standards & corrections policy, the methodology behind these numbers, or report a data error. Data current as of Aug 9, 2026.